Cradle crusher.



R. K. DONALD.`

CRADLE GBUSHER.

APPLIUATION FILED un. ze. 1907.

909,562. Patented .11111511901` 2 sums-sum 1.

B.. K. DONALD.

GRADLB CRUSHER.

APPLIOUION FILED APR. 2s, 1907.

909,562. Patented Jan. 12, 1909.

2 SHEETS-SHEET 2.

ROBERT KILLOCH DONALD, OF VICTORIA ROAD LOOH, VICTORIA, AUSTRALIA.

CRADLE CRUSHER.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed April 26, 1907. Serial No. 370,466.

To all whom it may concern:

Be it known that I, ROBERT KILLocH DON- ALD, a subject of the King ofGreat Britain, residing at Victoria Road Loch, in the State of Victoria,Australia, engineer, have invented Improvements in Cradle Crushers, ofwhich the following is a specification.

This invention relates to that kind of machine known as cradle Crusherswhich comprise a rocking trough, in which rests one or more looserollers, while the ore is automatically fed in at one end, along with aflow of water, and out at the other end through a screen on to theseparating tables.

The object of this invention is to provide means for readily fixing,removing, or adjusting the liner plates, in such Crushers while afurther improvement consists of feeding the ore under a series ofrollers, the first of which is lighter than the others, in order toobtain a more satisfactory crushing by the adjustment of the weights, toregulate the motion of the rollers.

Thedrawings illustrating the invention comprlseg-Figure 1 a sideelevation of the trough: Fig. 2 a half cross section and half endelevation thereof, and Fig. 3 a side elevation of one of the narrow barshereinafter referred to. Fig. 4 is a broken end elevation showing therocking means for the cradle.

Referring now to these drawings, it will be seen that the liner plates,which are provided for each roller are formed of one or more parts orsections, although shown in three sections 1, 2 and 3 on the drawing,and said sections are held in position by narrow longitudinal bars 4, 4,extending the full length of the trough 5, and bearing on the topsections of said liner plates. These narrow bars 4, 4, are recessed asat 6 from the top edges to receive the ends of transverse guide bars 7which accomplish the dual function of guiding the loose rollers whenrevolving in the trough and holding the liner plates in position. lThesections l, 2 and 3 of the liner plate, after being placed in positionin the trough, are thus held positively against displacement by the bars4, which cooperate as clamps for said sections, the abutting orconterminous edges of the sections and the bars 4 bearing frictionallyagainst one another.

The guide bars are situated between the liner plates and rollers exceptthe end ones which are between the end rollers and liner plates and theends of the trough. The liner as it passes through the Crusher.

plates are thus separated from each other and the grooves or recesses 16formed thereby may be utilized for amalgamating gold Said guide barsextend through the sides of the trough into a box-shaped casting 8 orthe like formed thereon. Bolts 9 are screwed down through said castingand bearing on the guide bars cause same to press the narrow bars 4, 4,down upon the top sections 1 and 3 of the liner plates thus firmlybinding all the sections of the liner plates together and securing samein position within the trough. Other bolts 10 are passed through the boxand preferably through slotted holes therein so that said guide bars maybe adjusted.

The narrow bars 4, 4 are secured in position against the sides of thetrough by screwed bolts 11 extending through slots 12 formed in saidsides and said screwed bolts are tightened when the liner plates arelixed in position. It will thus be seen that by loosening the screwedbolts 11 of the narrow bars 4, 4 and unscrewing bolts 9, 10 againstguide bars 7 said narrow bars may be lifted out or off, and the sectionsof the liner plates removed for replacement or for cleaning purposes.

The rollers which rest upon the liner plates are of varying weights thatof the rst 13 being the lightest while the others 14 and 15 are heavieror of successively increasing weight towards the discharge end of thetrough. The variation in the weight of the rollers is preferablyobtained by the casting of the cores thereof or by varying their lengthsor width or by any other suitable means. By this arrangement of thedifferent weight of the rollers a uniform travel can be arrived atgiving the maximum, crushing power of the rollers.

In Fig. 4 is shown means for rocking the cradle which comprises a crankdisk 17 attached by links 1S to beams 19, the latter connected to thecradle which has trunnions 2O mounted in bearings 21 forming the fulcrumpoint for said cradle.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. In a cradle crusher, in combination, a rocking troughhaving a liner plate formed of a plurality of independent sections,longitudinal bars arranged at opposite sides of said trough and bearingagainst the edges in, transverse divisionbars of said sections toconfine them, division bars extending transversely. of the trough andhaving a bearing upon the longitudinalbars, retaining means for thedivision bars, and crushing rollers resting on the sections of thelinerplate and confined between the division bars as guides.

2. In a cradle crusher, in combination, av rocking trough, a liner platetherefor, means detachably secured tothe trough and bearing with. aclamping action against the edges of the liner plate' toA confine thesame, and a crushing roller confined' in the trough and restingv uponthe liner plate;

3. In a cradle crusher, in combination, a rocking trough, a linerv platetherefor comprising'a plurality of independent sections assembled? incontinuity, means detachably securedi to theltrough and bearing uponopposite edgeslofsaid' plate to confine the sect/ion's as` aseries, anda crushing roller confined in the trough and resting upon the liner'plate;

if. InI a cradle crusher, in combination, a rocking'trough, a linerplate therefor, bars arranged at each side of the trough, longitudinallythereof, and bearing against thev adjacentl edv-es of the linerplate` toconne the same, saidbarshaving recesses formedI therepassed throughcorrespondingly located recesses in said longitudinal bars, boXingsprovided at the sides ofthe trough to receivethe end portions of saiddivision bars, and means for adjusting the division bars, vertically ofthe trough, in said boXings.

5. In a cradle Crusher, in combination', a rock-ing trough, spacedparallel guide bars mounted transversely of the trough and a pluralityof independent rollers loosely mounted in said trough and spaced fromone another by said guide bars, said' rollers being of successivelyincreasing Weight With respect to one another;

6; In a cradle Crusher, 1n combination, a .f

rocking trough, a liner plate therefor, bars arranged adjacent the sideedges of the trough longitudinally thereof andi bearing againsttheed'ges-of the liner plate, said bars serving as a clampingmeans forsaid plate retainingy meansfor saidf bars, and' a crushing rollerconfined in the troughand resting upon the liner plate.

In testimony whereof I have hereunto set my handl in presence of tWosubscribingk Witnesses.

ROBERT KILLOCH DONALD.

Witnesses EDWARD' WAT-Ens, EDWARD N. WATERS.

